Manual

SiGe, High-Linearity, 2300MHz to 4000MHz
Downconversion Mixer with LO Buffer
MAX19998
_______________________________________________________________________________________ 5
3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS—f
RF
= 3100MHz to 3900MHz,
LOW-SIDE LO INJECTION (continued)
(Typical Application Circuit, with tuning elements outlined in Table 1, R1 = 845ω, R2 = 1.1kω, RF and LO ports are driven from 50I
sources, f
RF
> f
LO
. Typical values are for T
C
= +25NC, V
CC
= 3.3V, P
RF
= -5dBm, P
LO
= 0dBm, f
RF
= 3500MHz, f
LO
= 3200MHz, f
IF
= 300MHz, unless otherwise noted.) (Note 7)
5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS—f
RF
= 3100MHz to 3900MHz,
HIGH-SIDE LO INJECTION
(Typical Application Circuit, with tuning elements outlined in Table 1, R1 = 698ω, R2 = 604ω, V
CC
= 4.75V to 5.25V, RF and LO ports
are driven from 50I sources, P
LO
= -3dBm to +3dBm, P
RF
= -5dBm, f
RF
= 3100MHz to 3900MHz, f
IF
= 300MHz, f
LO
= 3400MHz
to 4200MHz, f
RF
< f
LO
, T
C
= -40NC to +85NC. Typical values are for T
C
= +25NC, V
CC
= 5.0V, P
RF
= -5dBm, P
LO
= 0dBm, f
RF
=
3500MHz, f
LO
= 3800MHz, f
IF
= 300MHz, unless otherwise noted.) (Note 7)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IF Output Return Loss RL
IF
RF terminated into 50I, LO
driven by 50I source, IF
transformed to 50I using
external components shown
in the Typical Application
Circuit. See the Typical
Operating Characteristics
for performance vs. inductor
values.
f
IF
= 450MHz,
L1 = L2 = 120nH
17
dB
f
IF
= 350MHz,
L1 = L2 = 270nH
17
f
IF
= 300MHz,
L1 = L2 = 390nH
17
RF-to-IF Isolation f
RF
= 3100MHz to 3900MHz, P
LO
= +3dBm 27 dB
LO Leakage at RF Port f
LO
= 2800MHz to 3600MHz, P
LO
= +3dBm -30 dBm
2LO Leakage at RF Port f
LO
= 2800MHz to 3600MHz, P
LO
= +3dBm -26.5 dBm
LO Leakage at IF Port f
LO
= 2800MHz to 3600MHz, P
LO
= +3dBm -27.5 dBm
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Small-Signal Conversion Gain G
C
T
C
= +25NC
8.4 dB
Gain Variation vs. Frequency
DG
C
f
RF
= 3100MHz to 3900MHz, any 100MHz
band
0.15
dB
f
RF
= 3100MHz to 3900MHz, any 200MHz
band
0.3
Conversion Gain Temperature
Coefficient
TC
CG
f
RF
= 3100MHz to 3900MHz,
T
C
= -40NC to +85NC
-0.01
dB/NC
Input 1dB Compression Point IP
1dB
(Note 10) 11.4 dBm
Third-Order Input Intercept Point IIP3
f
RF1
- f
RF2
= 1MHz, P
RF1
= P
RF2
= -5dBm/tone,
T
C
= +25NC
24.8 dBm
IIP3 Variation with T
C
f
RF
= 3100MHz to 3900MHz, f
RF1
- f
RF2
= 1MHz,
P
RF1
= P
RF2
= -5dBm/tone, T
C
= -40NC to +85NC
Q0.2
dBm
Single-Sideband Noise Figure NF
SSB
No blockers present 9.8 dB
Noise Figure Temperature
Coefficient
TC
NF
Single sideband, no blockers present,
T
C
= -40NC to +85NC
0.018
dB/NC
2LO - 2RF Spur Rejection 2 x 2 f
SPUR
= f
LO
- 150MHz
P
RF
= -10dBm 70
dBc
P
RF
= -5dBm 65
3LO - 3RF Spur Rejection 3 x 3 f
SPUR
= f
LO
- 100MHz
P
RF
= -10dBm 89
dBc
P
RF
= -5dBm 79